My thoughts exactly.
Who would put their iPhone in their back pocket anyway. Worst case scenario someone pickpockets you, best case scenario you sit on your phone... I don't get it.
I carry mine in my BACK pocket exclusively. Then again, I am smart enough to remove it from my back pocket and place it on the table, desk, or carrier in my vehicle before I sit down. Also, I don't live in a "pickpocket" area.